Study of the Kalthoff-Winkler experiment using an ordinary state-based peridynamic model under low velocity impact

To overcome the limitation of constant Poisson's ratio in bond-based peridynamics, an ordinary state-based peridynamic (OSB PD) model was applied to simulate dynamic crack propagation in Kalthoff-Winkler specimen subjected to a low velocity impact. A typical linear peridynamic solid material constitutive was implemented to characterize the materials' behavior. This article focuses on capturing the underlying mechanisms of dynamic crack propagation; thus a wave propagation analysis was conducted, and the analysis was further verified by changing configurations of the specimen in horizontal and/or vertical directions. In addition, to evaluate the influence of parameters, a detailed parametric study of impact speed, plate thickness, and notch tip radius was performed. Crack initiation and propagation results agree well with experimental observations. Through parametric analysis, it was found that the impact speed has a remarkable influence on both crack propagation speed and crack path: increase of impact speed causes increased crack propagation speed and decreased crack angle; plate thickness has influence only on crack propagation speed: thicker plate leads to lower crack propagation speed; and notch radius has almost no influence on both of them.